/* Layout: one narrow column, a quiet bench-top palette (teal accent, amber for notes), mono for numbers. */
:root {
  --bg: #eaf0ef; --card: #ffffff; --text: #13211f; --muted: #576b68; --line: #cfdcda;
  --accent: #0b6e69; --accent-text: #ffffff; --sel: #dcefed; --imgbg: #ffffff;
  --ok: #17803d; --ok-bg: #e3f4e9; --bad: #b3261e; --bad-bg: #fcebe9; --warn: #86560a; --warn-bg: #fff3d6;
  --overlay: rgba(10, 20, 19, .5);
  --font: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1615; --card: #16211f; --text: #e3eeec; --muted: #92a8a4; --line: #2a3a38;
    --accent: #5fd3c8; --accent-text: #062320; --sel: #1b3330; --imgbg: #ffffff;
    --ok: #5fd48a; --ok-bg: #12301f; --bad: #ff8f86; --bad-bg: #3a1b19; --warn: #f2c066; --warn-bg: #35280d;
    --overlay: rgba(0, 0, 0, .6); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1615; --card: #16211f; --text: #e3eeec; --muted: #92a8a4; --line: #2a3a38;
  --accent: #5fd3c8; --accent-text: #062320; --sel: #1b3330; --imgbg: #ffffff;
  --ok: #5fd48a; --ok-bg: #12301f; --bad: #ff8f86; --bad-bg: #3a1b19; --warn: #f2c066; --warn-bg: #35280d;
  --overlay: rgba(0, 0, 0, .6); color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); background: var(--bg); color: var(--text); font: 16px/1.5 var(--font); }
a { color: var(--accent); }
h1 { font-size: 26px; line-height: 1.2; margin: 8px 0 12px; font-weight: 600; text-wrap: balance; }
h2 { font-size: 19px; margin: 20px 0 8px; font-weight: 600; }
h3 { font-size: 16px; margin: 0 0 6px; font-weight: 600; }
p { margin: 8px 0; }

.top { max-width: 860px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 18px; text-decoration: none; color: var(--text); }
.brand svg { color: var(--accent); }
.top nav { display: flex; align-items: center; gap: 14px; }
.top nav a { text-decoration: none; font-weight: 500; }
main { max-width: 860px; margin: 0 auto; padding-block: 16px 64px; min-width: 0; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin: 12px 0; min-width: 0; }
.muted { color: var(--muted); font-size: 14px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.row.end { justify-content: flex-end; }
.grow { flex: 1; min-width: 160px; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.grid .card { margin: 0; display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }
.grid .card .muted { margin: 0 0 6px; }
.grid .card button { margin-top: auto; }

button, .btn { font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--card); color: var(--text); padding: 8px 14px; border-radius: 8px; text-decoration: none; display: inline-block; }
button:hover { border-color: var(--accent); }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, .opt:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.danger { color: var(--bad); }
button.small { padding: 4px 10px; font-size: 14px; }
button:disabled { opacity: .5; cursor: default; }
button.chip.on { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
input[type=text], input[type=number], input[type=password], select, textarea { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text); width: 100%; min-width: 0; }
input[type=number] { width: 100px; }
input[type=file] { max-width: 100%; }
textarea { min-height: 90px; resize: vertical; }
label.field, div.field { display: block; margin: 12px 0; font-weight: 600; font-size: 14px; }
label.field > *, div.field > * { font-weight: 400; margin-top: 4px; }
label.check { display: flex; gap: 8px; align-items: center; margin: 10px 0; }
.bar { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }

.timer { font-family: var(--mono); font-weight: 600; padding: 4px 10px; border-radius: 8px; background: var(--sel); font-variant-numeric: tabular-nums; }
.timer.warn { background: var(--warn-bg); color: var(--warn); }
.progress { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin: 8px 0 4px; }
.progress > div { height: 100%; background: var(--accent); }
.qtext { font-size: 18px; font-weight: 600; margin: 4px 0 10px; line-height: 1.4; }
.hint { font-size: 14px; color: var(--muted); margin-bottom: 8px; }
.imgs { display: flex; gap: 10px; flex-wrap: wrap; margin: 8px 0; }
.imgs img { max-width: 100%; max-height: 320px; background: var(--imgbg); border: 1px solid var(--line); border-radius: 8px; padding: 4px; }

.opt { display: flex; gap: 10px; align-items: flex-start; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin: 8px 0; cursor: pointer; background: var(--card); min-width: 0; }
.opt > span:not(.tag) { min-width: 0; overflow-wrap: anywhere; }
.opt:hover:not(.locked) { border-color: var(--accent); }
.opt.sel { background: var(--sel); border-color: var(--accent); }
.opt.locked { cursor: default; }
.opt.right { background: var(--ok-bg); border-color: var(--ok); }
.opt.wrong { background: var(--bad-bg); border-color: var(--bad); }
.opt input { margin-top: 5px; accent-color: var(--accent); flex: none; }
.opt .tag { margin-left: auto; font-size: 12px; font-weight: 600; text-align: right; padding-left: 8px; flex: none; max-width: 40%; }
.opt.right .tag { color: var(--ok); }
.opt.wrong .tag { color: var(--bad); }
.notes { background: var(--warn-bg); color: var(--text); border-left: 4px solid var(--warn); padding: 8px 12px; border-radius: 6px; margin-top: 10px; font-size: 15px; }
.notes strong { color: var(--warn); }
.dots { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; }
.dot { width: 34px; height: 34px; padding: 0; border-radius: 6px; font: 500 13px var(--mono); }
.dot.done { background: var(--sel); border-color: var(--accent); }
.dot.cur { outline: 2px solid var(--accent); outline-offset: 1px; }
.score { font: 600 44px/1.1 var(--mono); }
.score .muted { font: 400 20px var(--font); }
.badge { font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 10px; white-space: nowrap; }
.badge.right { background: var(--ok-bg); color: var(--ok); }
.badge.wrong { background: var(--bad-bg); color: var(--bad); }
.badge.unanswered { background: var(--warn-bg); color: var(--warn); }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 12px 0; }
.warnlist { background: var(--warn-bg); color: var(--warn); border-radius: 8px; padding: 8px 12px 8px 28px; font-size: 14px; max-height: 200px; overflow: auto; }
.thumb { position: relative; display: inline-block; }
.thumb img { height: 70px; border: 1px solid var(--line); border-radius: 6px; background: var(--imgbg); }
.thumb button { position: absolute; top: -6px; right: -6px; padding: 0 6px; border-radius: 50%; }
.optrow { display: flex; gap: 8px; align-items: center; margin: 6px 0; }
.optrow label { white-space: nowrap; font-size: 14px; display: flex; gap: 4px; align-items: center; font-weight: 400; }
.err { color: var(--bad); font-weight: 600; }
.okmsg { color: var(--ok); font-weight: 600; }
.qrow { border-top: 1px solid var(--line); padding: 10px 0; }
.qrow:first-of-type { border-top: 0; }
.kbd { font-family: var(--mono); font-size: 13px; }
.gap8 { height: 8px; }

.overlay { position: fixed; inset: 0; z-index: 50; background: var(--overlay); display: flex; align-items: center; justify-content: center; padding: 16px; }
.dialog { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px; max-width: 420px; width: 100%; }
.dialog p { margin: 0 0 16px; }

@media (prefers-reduced-motion: no-preference) { .progress > div { transition: width .25s ease; } }

[hidden] { display: none !important; }
img.zoomable { cursor: zoom-in; }
.optkey { flex: none; font: 500 12px var(--mono); color: var(--muted); border: 1px solid var(--line); border-radius: 4px; min-width: 20px; text-align: center; padding: 0 4px; margin-top: 3px; }
@media (hover: none) { .keyhint, .optkey { display: none; } }
.keyhint { margin-top: 12px; }

.lightbox { flex-direction: column; align-items: stretch; justify-content: flex-start; padding: 0; z-index: 70; }
.lb-bar { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.lb-cap-wrap { min-width: 60px; text-align: center; color: var(--muted); font-size: 14px; }
.lb-close { margin-left: auto; }
.lb-body { flex: 1; overflow: auto; display: flex; padding: 12px; }
.lb-body img { margin: auto; max-width: 100%; max-height: 100%; background: var(--imgbg); border-radius: 6px; cursor: zoom-in; }
.lb-body img.zoomed { max-width: none; max-height: none; cursor: zoom-out; }

.refpanel { align-items: flex-start; overflow: auto; z-index: 60; }
.ref-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; width: 100%; max-width: 860px; margin: 0 auto; }
.ref-card .imgs img { max-height: 240px; }

.stats { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.stats .big { font: 600 30px/1.1 var(--mono); font-variant-numeric: tabular-nums; }
.stats .big .muted { font: 400 16px var(--font); }
.chart { width: 100%; height: auto; display: block; margin-top: 8px; }
.chart text { fill: var(--muted); font: 11px var(--mono); }
.chart .gridline { stroke: var(--line); stroke-width: 1; }
.chart .passline { stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 5 4; }
.chart .scoreline { stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .scorepoint { fill: var(--accent); stroke: var(--card); stroke-width: 2; }
.chart .hit { fill: transparent; }
.barrow { display: grid; grid-template-columns: minmax(120px, 34%) 1fr 56px; gap: 10px; align-items: center; padding: 5px 0; }
.barlabel { font-size: 14px; min-width: 0; overflow-wrap: anywhere; }
.bartrack { height: 10px; background: var(--line); border-radius: 5px; overflow: hidden; }
.barfill { height: 100%; background: var(--accent); border-radius: 0 5px 5px 0; }
.barval { font: 500 13px var(--mono); text-align: right; font-variant-numeric: tabular-nums; }
.tablewrap { overflow-x: auto; margin-top: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; font-variant-numeric: tabular-nums; }
th { color: var(--muted); font-weight: 500; }
details summary { cursor: pointer; color: var(--accent); margin-top: 8px; }
.exportrow { padding: 8px 0; border-top: 1px solid var(--line); }
.exportrow:first-of-type { border-top: 0; }
@media (max-width: 480px) { .barrow { grid-template-columns: 1fr 48px; } .barrow .bartrack { grid-column: 1 / -1; order: 3; } }

[hidden] { display: none !important; }
.login { max-width: 420px; margin: 24px auto 0; }
.login .tabs { margin-top: 0; }